Blue sulfur dye and process of making same.



UNITED STATES PATENT OFFICE.

ALCIDE FRANCOIS POIRRIER, OF PARIS, FRANCE, ASSlCrNOR TO STE. AME DES MATIERES COLORANTES ET PRODUITS' CHIMIQUES DE ST. DENIS,

OF PARIS, FRANCE.

BLUE SULFUR DYE AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 708,662, dated September 9, 1902.

Application filed March 29. 1901.

To all ZUhOTTo it may concern:

Beit known that I, ALCIDE FRANCOIS Pom- RIER, of Paris, France, haveinvented certain new and useful Improvements in the Mannfacture of Blue Dyestuffs, which improvements are fully described in the following specification.

In Patent No. 646,873, datedApril 3,1900, I have described and claimed a new process to for the preparation of sulfureted colors, and these colors dye cotton directly and consist in causing the products of the reaction of chlorid of sulfur on phenol or on the cresols (commercial cresol) to react upon aromatic bodies polyamids, amidohydroxylenes, (especially paraphenylenediamin, paramidophenol, and paraoxydiamidoparaoxydiphenylamin.)

Example 1. First, one hundred and fifty parts of the indophenol obtained by oxidation of an equimolecularmixture of paraphenylenediamin and phenol are dissolved in a solution of five hundred parts of sodium sulfid in cold water; second, after some hours the mixture is gently heated to about 120 to 130 centigrade, and there is at once added the product of the action of two hundred parts of sulfur chlorid on one hundred parts of phenol. This mixture is heated for two hours at 130 centigrade,and the temperature is then slowly o raised to 150 to 160 centigrade, so as to evaporate the water without passing this temperature, and thus to obtain a dry mass, which constitutes the new dyestuff and may be sent to market in this form. It is very soluble in water, giving a blue solution, from which it is completely precipitated by acids, the precipitate being soluble in soda and especially in alkali sulfids. Solutions in the latter or the aqueous solution dye unmordanted cot- 4: ton in the same manner as the sulfur blacks do, but the tints are a beautiful blue of high resistance. In this example the product of the action of sulfur chlorid on commercial cresol may be substituted for that of theaction of sulfur chlorid on phenol.

Example 2. Instead of employing, as in Example 1, indophenol made by the oxidation of a mixture of paraphenylenediamin and of phenol indophenol may be employed, ob-

tained by the oxidation of an equimolecular mixture of paraphenylenediamin and of ortho cresol.

One hundred and sixty parts of indophenol Serial No. 53,519. (No specimens.)

are reduced by three hundred parts of sodium sulfid at a temperature below the freezingpoint. The mixture is slowly heated from to and whenthe mass has become pasty I add two hundred parts of the product of the reaction of the chlorid of sulfur on' phenol. The mixture of substances is heated for about three hours from to until desiccation is complete. The new color is in the form of a black powder, soluble in water with difficulty, but very soluble in water containing caustic soda or sulfid of sodium. The dye in solution can be used directly for coloring cotton. The product of the reaction of chlorid of sulfur on phenol can be substituted bythe product of the reaction of the chlorid of sulfur on cresol.

That is claimed is- 1. The herein-described process of producing coloring-matter consisting in treating a solution of an indophenol and sodium sulfid, with the product resulting from the action of chlorid of sulfur on phenols.

2. The herein-described process of producing coloring-matter consisting in oxidizing a mixture of paraphenylenediamin and a phenol, forming a solution of the indophenol 80 thus obtainedwith sodium sulfid, and then I treating said solution with the product resulting from the action of chlorid of sulfur on phenols.

3. The described coloring-matter obtained by oxidizing a mixture of paraphenylenediamin and a phenol, forming a solution of the indophenol thus obtained with sodium sulfid, and then treating said solution with the product resulting from the action of chlorid of sulfur on phenols, the said coloring-matter being black in appearance, very soluble in water giving a blue solution from which it is completely precipitated by acids, the precipitate being soluble in soda and especially in 5 alkali sulfids, and solutions thereof in alkali sulfids or water dyeing unmordanted cotton in blue tints of high resistance. I

In witness whereof I have hereunto signed my name in the presence of two subscribing I00 witnesses.

ALCIDE FRANCOIS POIRRIER.

Witnesses:

J ULES ARMENGAUD, .Ieune, EDWARD P. MAOLEAN. 

